http://www.cruisindownriver.com/
I tried Southgate Ford but they said WCSX and FORD are taking up most of their lot. As an alternative SVT MIKE said Super K is good, which I agree. It is next to Southgate Ford.
I will be out there as early as necessary. Hopefully it will all work out. It will be first come first serve I imagine.
Kmart is on Fort at the corner of Fort and Pennsylvania:
16705 Fort St
Southgate, MI
48195-1442, US
Can get driving directions here